Riding today went in some very large rocks ,front and rear wheels both against them, stopped position .I was in high range first and would not accelerate,shifted to low and still did not want to go. backed off 6 inches and went on smelt belt slipping . the atv had not warmed up yet only been running 3 min. just bought this atv and wondering if belt may be bad ,it only has 600 miles on it 2000 quadmaster 500. Thank you Randy